Combination-fuse.



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No. 737,229. PATBNTED AUG. 25, 1903. 0. HARTMANN, COMBINATION FUSE.

APPLICATION FILED JUNE 26, 1900.

N0 MODEL.

Jilornejy f UNITED STATES Patented August 25," 1903.

PAT NT /OFFICE .,1

.oscAR HARTMANN, or ESSEN-ON5THE4RUHR, GERMANY,'ASSIGNORQ TO FRIED. KRU-PP, or ESSEN-ON-THE-RUHR, GERMANY.

COMBINATION-FUSE.

SPECIFICATION forming part of LettersPatent No. 737,229, dated August 25, 1903, Application filed June 26,1900. Serial No. 21,662. (No model.) i

To (0Z6 whom it, may concern:

Be it known that I, OSCAR HARTMANN, a citizen of the German Empire, residing at Essen-on-the-Ruhr, Germany, have invented certain new and useful Iin proveinents in Com-' bination-Fuses, of which the following is a specification.

'In combination-fuses made of a comparatively soft metal-for instance, of alumininm-the parts of the percussion-fuse are apt to be distorted on the striking of the-projectile, whereby the action of the fuse is rendered uncertain. It has been attempted to counteract this disadvantage by arranging the parts of the percussion-fuse within a shell projecting into the lower end of the body of theprojectile. Bythisarrangementtheparts of the percussion-fuse are protected; but the space occupied by the case reduces the space within the projectile for the reception of balls or bursting charge.

The object of the present invention is to arrange the parts of the percussion-fuse in a manner to protect them against distortion in striking even when they are placed within the fuse-body proper and outside of the bore of the projectile. This object I have accomplished-by inclosing the parts of the percussion-fuse within a case of hard steel.

My invention will be bestunderstood when described in connection with the annexed drawing, which shows a section through the axis of the body of a combination-fuse, which otherwise is constructed in the usual wellknown manner.

In the drawing the letter A designates the body of the combination fuse, into which body is inserted from beneath, with its bottom G up, a cup-shaped case F, made of hard steel. The bottom G carries the needle E for the -time-fuse and the needle H for the percussion-fuse. closed by a cap K, provided with a perforation which serves as a fire-channel.

v By the above-described arrangement the parts of the percussion-fuse are perfectly protected within the steel case F, so that when the projectile strikes they do not share the distortion of the body A, and missing fire is excluded.

What I claim as now is- The end of the steel case F is,

1. A fuse having means made of harder material than the body of the fuse to protect a part of the fuse against distortion.

-2. A combination-fuse having means-inserted within andof harder material than the body of the fuse toprevent the distortion of the percussion-fuse.

3. The combination with a. fuse, ofa caseof metal, harder than the metal of which the fuse is constructed, to surround the working parts and protect them from the distortion of the fuse.

4. ,In a combination-f use, a hard-steel case inserted within the'body of the-fuse and containing the parts of the'percussion fuse;

whereby their distortion on striking is preventedand certainty of action insured, sub stantially as shown and described.

5. A combination-fuse having its body provided with a central cavity, and a hard-steel case inserted intosaid cavity and closely fitting the same; said case containing the operative parts of the percussion-fuse and serving to protect the latter from distortion on impact, substantially as described. 6. A combination-fuse having its body provided with a central cavity extending inwardly from its base, a hard-steel case inserted into said cavity and closely fitting the same; said case containing the operative parts of the percussion-fuse and serving to protect the latter, a perforated cap at the outer end of the case, and pins attached to the inner end of the case and adapted to strike the primers of the time-fuse and the percussion-fuse, substantially as described.

- 7. A combination-fuse having its body provided with a central cavity extending inwardly from its base, a hard-steel case closed at its inner end and fitted into said cavity; said case containing theoperative parts of the percussion-fuse and provided with an ex terior shoulder abutting against the inner portion of the body of the fuse, a perforated cap closing the outer end of the case, and pinsattached tothe inner end of the case and adapted to strike the primers of the time-fuse I and the percussion-fuse, substantially as de-.

scribed.

8. A combination-fuse having its body provided with a central cavity extending inwar-ally from the base thereof, and a hardmy hand in the presence of two subscribing steel case fitted to said. 'cavity and bearing witnesses. against the body of the fuse; said oa'se eontaining the operative parts of the percussion- 5 fuse and serving to protect the latter, sub-' Witnesses: stantially as described. j WILLIAM ESSENWEIN,

In testimony whereof Iha've hereunto set l ERNESTYANDRE. v

OSCAR HAR'IMANN. 

